add service

internal/model/session.go

@@ -0,0 +1,15 @@
+package model
+
+import "time"
+
+type Session struct {
+	ID           int
+	UserID       int
+	AccessToken  string
+	RefreshToken string
+	IP           string
+	UserAgent    string
+	CreatedAt    time.Time
+	ExpiresAt    time.Time
+	RevokedAt    *time.Time
+}